1 definition by ian has a monobrow
a YUF is a small jump made by two relatively insane people into each other, they run and jump into each other and shout YUF as they colide with pain.
garrett and robin were bored so they did a yuf, after that they colapsed on the floor in imense pain, so they got up and dit it again.
by ian has a monobrow May 9, 2006